Jsonmodel

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* **METHOD ADDED** use_declared method to assign declared values to defaults
* **FEATURE ADDED** declared_value coverage for list datatypes

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* **FEATURE ADDED** validation of any valid datatype for null declarations
* **FEATURE ADDED** ingestion of any valid datatype for null declarations

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* Bug fix to remove unused optional argument in explain method

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* **FEATURE ADDED** custom error messages added for regex pattern criteria
* **FEATURE ADDED** explain method added to InputValidationError
* **DEPRECATED** full path of keys added to extra fields error report
* dataModel property added as deepcopy of data_model argument

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* **UPGRADE** extensions package with add-on methods for json model objects
* **FEATURE ADDED** tabulate method to extensions to create a table from json model criteria
* **FEATURE ADDED** min_size & max_size conditionals added to map fields
* **DEPRECATED** max_size field in top-level json model schema declaration
* Bug fix for reporting correct javascript dot_path syntax on query errors

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* **FEATURE ADDED** 'default_value' conditional added to list fields
* **FEATURE ADDED** integer fields in schema are automatically declared as integer_data
* Updated required field default to False for list fields with empty items
* Updated component and query validation to parse javascript dot_path syntax
* Updated query criteria to map number, string and boolean declarations to equal_to qualifier